Joints and connections – Interfitted members – Including set screw
Patent
1997-10-17
2000-07-25
Kim, Harry C.
Joints and connections
Interfitted members
Including set screw
403373, 384541, F16C 35063
Patent
active
060929561
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a device which can be selectively locked or clamped to a rotatable component such as a shaft or tube.
BACKGROUND TO THE INVENTION
Our earlier U.K. Patent Application No. 9419372.9 (2 282 209A) describes locking devices which can be used with a rotatable component such as a shaft or a tube. Although such devices achieve a reliable locking function, a collar means of the device tends to tilt when the device is locked in position and hence wobbles when the shaft or tubes revolves. A general object of the present invention is to provide an improved form of locking device which overcomes this defect.
DISCLOSURE OF THE INVENTION
According to one aspect of the invention there is provided a device for locking to a component rotatable about an axis; said device comprising collar means having an end wall with a bore defining a surface for confronting an outer surface of the rotatable component and a region extending axially from the end wall, a ring for disposing between the axial region of the collar means and the component, the ring having a first inner surface for confronting the outer surface of the component and a second outer surface which is inclined relative to the axis of rotation to converge with respect to the axis of rotation in a direction away from the end wall and several screw-threaded elements received in screw-threaded bores extending through the axial region of the collar means and spaced apart relative to the rotational axis other than at 180.degree., the threaded bores being disposed in positions non-radial relative to the rotational axis. The arrangement is such that the screw-threaded elements can be tightened to bear into or against the second outer surface of the ring to cause the bore surface of the collar means and the first surface of the ring to act as contact surfaces with respect to the outer surface of the component which exert clamping force on the component at diametrically opposed zones.
According to another aspect of the invention there is provided a device for locking to a hollow component rotatable about an axis; said device comprising collar means having an end wall with an outer surface for confronting an inner surface of the component and a region extending axially from the end wall; a ring for disposing between the axial region of the collar means and the component, the ring having a first outer surface for confronting the inner surface of the component and a second inner surface which is inclined relative to the axis of rotation to diverge with respect to the axis of rotation in a direction away from the end wall and several screw threaded elements received in screw-threaded bores extending through the axial region of the collar means and spaced apart relative to the rotational axis other than at 180.degree., the threaded bores being disposed in non-radial positions relative to the rotational axis. The arrangement is such that the screw-threaded elements can be tightened to bear into or against the second inner surface of the ring to cause the outer surface of the ring and the outer surface of the end wall of the collar means to act as contact surfaces with respect to the inner surface of the component which exert clamping force on the component at diametrically opposed zones.
By arranging the screw-threaded elements in bores in non-radial positions on the collar means the tendency for the collar means to wobble as the rotatable component revolves can be prevented.
The threaded bores preferably have axes which intersect at a location offset from the rotational axis in an anti-clockwise sense as viewed in the direction of the rotational axis and from the end wall of the collar means.
Preferably there are two screw-threaded elements with their rotational axes spaced apart around the location where the axes of the associated threaded bores intersect by about 120.degree.. Each screw-threaded element thus has its axis offset from a true radial direction relative to the rotational axis.
The ends of the screw-threaded element
REFERENCES:
patent: 2739830 (1956-03-01), Firth
patent: 3598432 (1971-08-01), Walker
patent: 4097167 (1978-06-01), Stratienko
patent: 4403814 (1983-09-01), Koss et al.
patent: 4483513 (1984-11-01), Summers
patent: 5269118 (1993-12-01), Bullaro
patent: 5678949 (1997-10-01), Swinley
Kim Harry C.
NSK-RHP European Technology Co. Limited
LandOfFree
Locking device for use with shafts or tubes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Locking device for use with shafts or tubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Locking device for use with shafts or tubes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1332120